I'd love some kind of hover text or key to tell me what all of these different color options mean; I have no idea exactly when the translucency comes into play or what something like "Mid-tone" does.
Even with the things that have example buttons, in practical application, when am I going to see Accents 1-5 in use? Where they are on the page would change how I'd want them to look.
I'm too stupid for this kind of stuff; I keep just having to try trial and error with any color changes I make, and some of them don't seem to do anything immediately obvious, so basically most of what I've done is just replace orange with a color more to my liking.